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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
Slender and thread like structure of fungi are calledA. MyceliumB. RhizoidsC. RhizinaeD. Hyphae |
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Answer» Correct Answer - D Slender and thread like structure of fungi are called Hyphae. |
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| 802. |
After karyogamy followed by meiosis, spres are produced exogenously inA. Neurospora is used in the study of biochemical geneticsB. AlternariaC. AgaricusD. Saccharomyces |
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Answer» Correct Answer - C After karyogamy followed by meiosis, spores are produced exogenosuls in class basidiomycetes (Agaricus). |
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| 803. |
Crystals of virus consist largely ofA. DNAB. RNAC. ProteinD. Histone |
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Answer» Correct Answer - C Crystals of virus consist largely of protein. |
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| 804. |
Which organism have an infectious spore like stage in their life cycle ?A. EntamoebaB. TrypanosomaC. ParamoeciumD. Euglena |
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Answer» Correct Answer - D Sporozoan have an infectious spore like stage in their life cycle. |
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| 805. |
Organisms living in salty areas are called asA. methanogensB. halophilesC. heliophytesD. thermoacidophiles |
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Answer» Correct Answer - B Halophiles are organisms that live in areas of high concentration of salts. The name halophiles is originated from the greek word that means salt loving Whereas heliophytes are the plants that grow best in sunlight and can not survive in salty conditions Methanogens are the bacteria that produces methane as a metabolic by products in anaerobic conditions Thermoacidophiles are archaebacteria striving under strong acidic environments and high temperatures, but can be not tolerate high salt concentrations around them. |
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| 806. |
Select the correct statement regarding heterocysts.A. These are present in some filamentous cyanobacteria such as Nostoc and Anabaena.B. These cells are specialisd to perform `N_(2)-`fixation.C. These cells contain enzyme nitrogenase.D. All of these |
| Answer» Correct Answer - D | |
| 807. |
Under unfavourable conditions, bacteria reproduce byA. FissionB. PlasmodiumC. Fruiting bodiesD. Spore |
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Answer» Correct Answer - D Under unfavourable condition, bacteria are reproduced by Spore. |
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| 808. |
A virus differs from a bacterium as its containsA. A cell wallB. CytosolC. DNA as genetic materialD. DNA or RNA as genetic material with no ribosome |
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Answer» Correct Answer - D A virus differs from a bacterium as its contains DNA or RNA as genetic material with no ribosome. |
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| 809. |
In Dryopteris, the dehiscence of sporangium is controlled byA. IndusiumB. RamentaC. AnnulusD. Peristome |
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Answer» Correct Answer - C In Dryopteris, the dehiscence of sporangium is controlled by annulus. |
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| 810. |
Find the equation of parabola satisfying the condition vertex (0,0) passing through (-3,4) and axis is along y-axis. |
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Answer» ANSWER : 16x2 = 9y The axis of parabola is along y-axis. So let the equation of parabola be x2 = 4by The point ( -3 , 4 ) lie on the parabola . so the point must satisfy the equation of parabola . ( - 3 )2 = 4b × 4 9 = 16b b = 9/16 \(\therefore\) The equation of parabola is 16x2 = 9y |
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| 811. |
Show that the line x+y-2=0 touches the Parabola x^2=-8y. Find the co-ordinate of the point of contact. |
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Answer» ANSWER: ( 4 , - 2 ) We know that , The tangency condition of parabola is c = a/m Given line → x + y - 2 = 0 Here c = - 2 and m = -1 Parabola → x2 = - 8y a = 2 a/m = 2/-1 = -2 Hence c = a/m \(\therefore\) x + y - 2 = 0 is a tangent to the parabola x2 = - 8y . The equation of tangent at point ( x1 , y1 ) to the parabola x2 = - 8y is xx1 = -4( y + y1 ) xx1 = -4y - 4y1 xx1 + 4y + 4y1 = 0 comparing the above equation with x + y - 2 = 0 x1 = 4 = - 2y1 x1 = 4 y1 = - 2 \(\therefore\) The coordinates point of contact are ( 4 , - 2 ). |
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| 812. |
Assertion.Cyanobacteria are photosynthetic blue-green algae with procaryotic structure. Reason. They are green due to presence of chloroplasts.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true but R is not the correct explanation of AC. If A is true but R is false.D. If both A and R are false |
| Answer» Correct Answer - A | |
| 813. |
Define respiratory climactic. Name the PGR associated with it. |
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Answer» The rise in the rate of respiration during the ripening of fruits is known as respiratory climatic. It is associated by ethylene. |
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| 814. |
The correct order of electron affinity isA. `F gt Cl gt Br`B. `F gt Cl gt Br`C. `F lt Cl lt Br`D. `F lt Cl lt Br` |
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Answer» Correct Answer - C `F` has lesser electron affinity than that of `Cl` because of its compact electornic configuration. |
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| 815. |
The correct electron affinity order of `N,O,S,Cl` is:A. `O lt N lt Cl lt S`B. `Cl gt O gt S gt N`C. `N lt O lt S lt Cl`D. `N = Cl gt O = S` |
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Answer» Correct Answer - C ` {:(2nd "period",N,O),(3rd "period",S,Cl),(EA^(3rd) "period"gt,EA^(2n),period):}` (more repulsion of electrons) `Cl gt Sgt O gt N`. |
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| 816. |
Order of electron affinity of `F,Cl,Br` and `I` isA. `FltClgtBrgtI`B. `FgtClgtBrgtI`C. `FltClltBrltI`D. `FgtClgtBrgtI` |
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Answer» Correct Answer - A Electron affinity of `Cl` is greater than fluorine so the order is as `F lt Cl lt Br lt I`. |
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| 817. |
Electron affinity is theA. Energy absorbed when an electorn is added to an isolated atom in the gaseous state.B. Energy released when an electron is added to an isolated atom in the gaseous stateC. Energy required to take out an electron from an isolated gaseous atomD. Power of an atom to attract an electron to itself. |
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Answer» Correct Answer - B Energy released when an electron is added to an isolated atom in gaseous state. |
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| 818. |
The electorn affinity values for the halogens shown the following trendA. `F lt Cl gt Br gt I`B. `F lt Cl lt Br lt I`C. `F gt Cl gt Br gt I`D. `F lt Cl gt Br lt I` |
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Answer» Correct Answer - A Electron affinity value of `Cl` is greater than the `F` and then decreases down the group. |
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| 819. |
For electron affinity of halongens which of the following is correctA. `BrgtF`B. `FgtCl`C. `Br lt Cl`D. `FgtI` |
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Answer» Correct Answer - C Electron affinity of chorine is maximum. |
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| 820. |
For electron affinity of halongens which of the following is correctA. `BrgtF`B. `FgtCl`C. `BrltCl`D. `FltI` |
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Answer» Correct Answer - C Electrons affinity of chorine is maximum. |
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| 821. |
The order of the magnitude of first ionisation potentials of `Be,B,N` and `O` isA. ` N gt O gt Be gt B `B. `N gt Be gt OgtB `C. ` Be gt B gt N gt O`D. ` B gt Be gt O gt N` |
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Answer» Correct Answer - A `NgtOgtBegtB` first ionisation but energy of` NgtO` because of half-filled p-orbital |
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| 822. |
The first ionisation potentials (eV) of `Be` and `B` respectively areA. `9.32eV,8.29eV`B. `9.32eV,9.32eV`C. `8.29eV,8.29eV`D. `8.29eV,9.32eV` |
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Answer» Correct Answer - A First `IP` of `Be gt B` because of stable `ns^(2)` configuration. |
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| 823. |
The d-block elements consists mostly ofA. Monovalent metalsB. All non-metalsC. many mentals with catalytic propertiesD. Elements which generally from stoichiometric mental oxide |
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Answer» Correct Answer - C Many metals with catalytic properties because (i) They provide surface area for reaction to occur (ii) They decrease the ionisation energy . (iii) They have vacant d-orbitals. |
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| 824. |
Which one of the elements has the maximum electron affinity?A. `F`B. `Cl`C. `Br`D. `I` |
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Answer» Correct Answer - B Fluorine although have the highest electonegativity due to its very small size, effective inter electronic repulsions are observed which bring down its electron affinity. |
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| 825. |
Which of the following statement is wrong for the d-block elements?A. General electronic configuration for them is `(n-1)d^(1-10)ns^(0-2)`B. They generally exhibit variable valency .C. Last electron enters in `(n-1)d` subshell in them.D. They are placed from third period to sixth period in modern peridic table. |
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Answer» Correct Answer - D Transition elements start from 4th period as they have valence shell configuration `(n-1)d^(1-10)ns^(1-2)`. So minimum possible value of `n` is `4`. |
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| 826. |
Among the following options , the sequence of increasing first ionisation potential will beA. `B lt C lt N`B. `B gt C gt N`C. `C lt B lt N`D. `N gt C gt B` |
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Answer» Correct Answer - A `1^(st)` I.P. Increases from left to right in a period. |
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| 827. |
The correct sequence of elements in decreasing order first ionisation energy isA. `NagtMggtAl`B. `MggtNagtAl`C. `AlgtMggtNa`D. `MggtAlgtNa` |
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Answer» Correct Answer - D `Mg gt Al gtNa`. This is due to the presence of fully filled s-orbital in `Mg`. |
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| 828. |
The atomic number of an element variable valency.A. Number of electronsB. Number of protonsC. Number of neutronsD. Number of isotopes |
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Answer» Correct Answer - B The atomic no. of an element is derived from the no.of proton because during chemical reaction no. of electron undergoes for change. |
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| 829. |
Which of the following elements will have the lowest first ionisation energy?A. `Mg`B. `Rb`C. `Li`D. `Ca` |
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Answer» Correct Answer - B Alkali metals have the lowest first ionisation energy. Because they gain stable configuration after the removal of one electron outermost shell. |
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| 830. |
the maximum valency of an element with atomic number `7` isA. `2`B. `5`C. `4`D. `3` |
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Answer» Correct Answer - B Valency is according to valence shall configuration which here is `1s^(2),2s^(2),2p^(3)`, ie. `5`. |
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| 831. |
Which among the following factors is the most important in making fluorine oxidizing halongen?A. Hydration enthalpyB. Ionisation enthalpyC. Electrons affinityD. Bond dissociation energy |
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Answer» Correct Answer - D The bond dissociation energy of `F-F` bond is very low. The weak `F-F` bond makes fluorine the strongest oxidising halogen. |
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| 832. |
In a given shell, the order of screeing effect isA. `s gt p gt d gt f`B. `f gt p gt s gt d`C. `d gtgt fgt sgt p`D. `pgt dgt sgt f` |
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Answer» Correct Answer - A Screening effect in a given shell decreases with decrease of peneration effect. For a given value of `n`, lower the value of `1`, greater is the penetration effect. Thus, the correct order of screening effect is `s gt p gt dgt f` |
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| 833. |
Assertion:On moving down the group the group,ionization enthalpy decreases.Reason:With decreases in size of the atom,the force of attraction between the nucleus and valence electrons decreases.A. If both assertion and reason is the correct explanation of assertion.B. If both assertion and reason is the correct explanation of assertion.C. If both assertion and reason is the correct explanation of assertion.D. If both assertion and reason is the correct explanation of assertion. |
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Answer» Correct Answer - C I.E decreases down the group due to increase in atomic size and the outermost electeronbeing increasingly father from the nucleus,there is an inreased shielding of the nuclear charge by the electrons in the inner levels. |
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| 834. |
Fluorine is the best oxidising agent because it hasA. Higest electron affinityB. Highest `E_(red)^(0)`C. Highest `E_("oxid")^(0)`D. Lowest electorn affinity |
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Answer» Correct Answer - B Fluorine has highest `E^(@)` red {equal to `+2.9V`} due to which it can easily accept an electron and hence it is the best oxidising agent. |
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| 835. |
Assertion:The atomic size generally increases across a period and decreases down the group.Reason:Atomic size depends upon valence shell electronic configuration.A. If both assertion and reason is the correct explanation of assertion.B. If both assertion and reason is the correct explanation of assertion.C. If both assertion and reason is the correct explanation of assertion.D. If both assertion and reason is the correct explanation of assertion. |
| Answer» Correct Answer - D | |
| 836. |
Oxidising action increases in halogen in the following orderA. `Cl lt Br lt I lt F`B. `Cl lt I lt Br lt F`C. `I lt F lt CI lt Br`D. `I lt Br lt Cl lt F` |
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Answer» Correct Answer - D Tendency to gain `e^(-)` and oxidising power are related. Among halongens `F` is the directly most powerful oxidising agent. |
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| 837. |
Assertion: Shielding effect increases as we go down the group. Reason: More is the number of electrons in the penultimate shell, more is shielding.A. If both assertion and reason is the correct explanation of assertion.B. If both assertion and reason is the correct explanation of assertion.C. If both assertion and reason is the correct explanation of assertion.D. If both assertion and reason is the correct explanation of assertion. |
| Answer» Correct Answer - A | |
| 838. |
Assertion: Shielding effect increases as we go down the group. Reason: More is the number of electrons in the penultimate shell, more is shielding.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If the assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - A Both assertion and reason are true and reason is the correct explanation of assertion. The phenomenon is which the Penulimate Shel `(n-1)` electorns act as screen or shield in between nucles and valence shell electrons thereby reducing the effective nuclear charge is known as shielding effect. |
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| 839. |
which of the following gas does not have an octet or eight electrons in the outer shell?A. `Ne`B. `Ar`C. `Rn`D. `He` |
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Answer» Correct Answer - D He has the atomic number 2 so it does not having octet. |
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| 840. |
Given correct IUPAC name of: A. Ethyl-2-ethyl-5,5 dimethyl cyclopentane carboxylateB. Ethenyl-2-ethyl-5,5-dimethyl cyclopentane carboxylateC. Ethenyl-5-ethyl-2-,2-dimethyl cyclopentanoateD. Ethenyl-5-ethyl-2,2-dimethyl cyclopentane carboxylate |
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Answer» Correct Answer - D |
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| 841. |
Which of the following oxides is amphoteric is nature ?A. `CaO`B. `CO_(2)`C. `Sio_(2)`D. `SnO_(2)` |
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Answer» Correct Answer - D `CaO` is basic, `CO_(2)` is acidic , `SiO_(2)` is weakly acidic. `SnO_(2)` is amphoteric. |
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| 842. |
which of the following has the least ionisation potential?A. `Li`B. `Cl`C. `Cs`D. `H` |
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Answer» Correct Answer - C `Li` and `Cs` belong to first group but `Cs` has larger size, hence low nuclear attraction force, thus low Ionisation energy. |
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| 843. |
the elements on the right side of the periodic table areA. MentalsB. metalloidsC. non-metalsD. transition elements |
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Answer» Correct Answer - C Elements on the right side of the periodic table are p-block. Mostly non-metals. |
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| 844. |
If the atomic number of an elements is 33, it will be place in the periodic tabe in theA. first groupB. fifth groupC. third groupD. seventh group |
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Answer» Correct Answer - B `33:1s^(2),2s^(2).2p^(6),3s^(2),3p^(6),4s^(2),3d^(10),4p^(3)` it its valence shell `5underset(bar)(e)^(-)` are present so it is fifth (A) group elements. |
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| 845. |
Which one of the following belongs to representative group of elements in the periodic table?A. AluminiumB. ArgonC. chromiumD. Lanthanum |
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Answer» Correct Answer - A Aluminium . As it belongs to p-block elements. |
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| 846. |
the tenth elements in the periodic table resembles with areA. First periodB. second periodC. fourth groupD. Ninth group |
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Answer» Correct Answer - B Each period consists of a series of elements whose atom have the same principal quantum no.(n) of the outer most shell ie, in second period `n=2` this shell has four orbitals (one `2s` and three `2p` ) which can have eight electrons, hence second period constains 8 elements from atomic number 3 to 10. |
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| 847. |
The basis of keeping the elements in the group of periodic table isA. Ionisation potentialB. ElectronegativityC. Electron affinityD. Number of electrons in the valence shell |
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Answer» Correct Answer - D The elements which having same number of electorns in the valence shell are placed in the same group of periodic table. |
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| 848. |
Which of the following statement is correct?A. `X^(-)` ion is larger in size than X atomB. `X^(+)` ion is larger in size than X atomC. `X^(+)` ion is larger in size than `X^(-)` ionD. `X^(+) and X^(-)` ion are equal in size |
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Answer» Correct Answer - A `X^(-)ion` larger in size than `X` atoms . Because of low effective nuclear charge on `X^(-),X` has a bigger size . |
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| 849. |
which substnaces forms cell wall in fungi? |
| Answer» Correct Answer - Chitin. | |
| 850. |
Main component of the cell wall of fungi isA. CelluloseB. PectinC. ChitinD. Dextrin |
| Answer» Correct Answer - C | |